How many grams of Sn are there in a sample of Sn that contains 7.54×1023 atoms?

Combustion analysis of 1.00 g of the male sex hormone, testosterone, yields 2.90 g of CO2 and 0.875 g H2O. What are the mass percents of carbon, hydrogen, and oxygen in testosterone?

Which of the following compounds has the highest mass percent of chlorine? (a) BCl3 (b) AsCl3 (c) GaCl3 (d) AlCl3 (e) PCl3

Potassium superoxide, KO2, is employed in a self-contained breathing apparatus used by emergency personnel as a source of oxygen. The reaction is 4KO2(s)+2H2O(l)4KOH(s)+3O2(g) If a self-contained breathing apparatus is charged with 750 g KO2 and then is used to produce 188 g of oxygen, was all of the KO2 consumed in this reaction? If the KO2 wasnt all consumed, how much is left over and what mass of additional O2 could be produced?

ow many molecules of water are there in a 10.0-g sample of water? How many hydrogen atoms are there in this sample?

The structure of one of the bases in DNA, adenine, is shown here. Which represents the greater mass: 40.0 g of adenine or 3.0 1023 molecules of the compound?

3.95 Cumene is a hydrocarbon, meaning that it contains only carbon and hydrogen. If this compound is 89.94% C by mass and its molar mass is 120.2 g/mol, what is its molecular formula?

A compound associated with the odor of garlic on a persons breath has the chemical formula CyH8S and a formula mass of 88.19 amu. What number does y stand for in the chemical formula of the compound?

What is the mass, in grams, of 1.000 mole of each of the following substances? a. S (sulfur) b. Mg (magnesium) c. NH3 (ammonia) d. H2SO4 (sulfuric acid)

Complete the following table for TNT (trinitrotoluene), C7H5(NO2)3.